Fossils, trees, current animals. These all offer insight to the history of life on earth
C, glycosis breaks down glucose of enzymes
Movement, respiration, sensitivity, growth, reproduction, excretion, nutrition, homeostasis, evolution etc.
A hypothesis that can be accepted as true based on repeated experimentation with similar results
A hypothesis is a supposition made by the scientist. In order for a hypothesis to be a scientific hypothesis, the scientific method requires for it to be tested. If a hypothesis cannot be tested, it cannot be scientific hypothesis. It is important to state the hypothesis clearly at the beginning of a scientific paper. This enables the reader to understand the problem.
The chemical make-up can change, viscosity, or nothing. It really depends on the liquid.